Update the ISO default Zot pin and build docs from v0.2.29 to v0.2.42 so the next image stages the current rebuilt FreeBSD zot binary instead of recording a mismatched checkout/binary pair. Also refresh the release runbook's 0.11.0 examples.\n\nValidation: ./scripts/check-format.sh; sh -n build.sh scripts/stage-zot-iso.sh; BUILD_CHANNEL=dev build.cfg default check; git diff --check.